If it is separated from the body, it does not subsist.
A material form is a form that is not an immaterial subsistent; it exists either as an accident in a corporeal subject or as a substantial form in a corporeal subject, and does not subsist.
It's a good thing, then, that people don't subsist on plant sap.
If putting your fingers up there really grosses you out, wrap your digits in a condom or use a rubber glove, but as long as you don't subsist on a diet of Taco Bell and Fritos, you're probably fine.
Objectives can be assumed to be subsistent (factual), although they do not subsist (are nonfactual).
Italos' terminology here clearly shows the influence of the Christian Fathers, and in particular of John of Damascus, who in his Dialectica draws just this distinction between subsistences, things that subsist in something else, and things that do not subsist.
KELLY COYNE and Erik Knutzen do not subsist on a diet of lentils and gloom.
Nonfactual objectives (nonfacts, [Untatsachen]) do not subsist and are thus objects beyond being.
Nomads did not subsist on meat alone, nor did they wear only the wool of their animals.
According to Italos (quaestio 19), things that do not subsist (anupostata) but depend on mere thought are not beings.
Diagnostic problems usually do not subsist in UIP due to the typical laterobasal abnormalities distribution, layered arrangement of cysts, intralobular interstitial thickening and traction bronchiectasis.
